用于强非线性负荷的瞬时无功与谐波电流检测算法研究

为解决强非线性与类随机性负荷下的瞬时无功与谐波补偿问题,综合应用ip-iq法和p-q法,提出了一种有效的瞬时无功与谐波电流检测算法。该算法适用于任意工况的三相电路,包括三相四线制电路、电压非对称正弦或含有谐波等情况。理论推导和仿真证明了该算法的正确性和有效性。同时,将该算法进行推广,可实现对任意次谐波正序或负序有功、无功电流的有效提取。

Investigation on a new algorithm for instantaneous reactive power and harmonics currents detection applied to intensively nonlinear loads

To pursue an improved solution to instantaneous reactive power and harmonics compensation with intensively nonlinear and quasi-stochastic loads,an effective algorithm is presented by comprehensive integration of i_p-i_q and p-q methods to detect instantaneous reactive power and harmonic currents.The algorithm can theoretically be applied in three-phase circuit of any working conditions including three-phase four-wire circuit,asymmetric or harmonic voltage sources,etc.Both theoretical deduction and computer simulation demonstrate the accuracy and feasibility of the algorithm.Also,the above algorithm is expanded for further applications,which can effectively realize extraction and decomposition of the active or reactive components of either positive-sequence or negative-sequence currents with respect to any order harmonics.